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P. E. HUNTER.

ANNEALING Box, APPLICATION FILED APR. 15. 1918,

Patented June 3, 1919.

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i /i 6% R WITNESSES w WW "1e county eniesylvenie, Kim nnealii'w' Biol-ms; of which an improvemem axgteol for. die new. zindqis particularly 12% ,1 ieeling sh et metal a pie i Le Sneeificetiorc. oz mtters Patent.

BOX.

Serial No, 225351788.

arrangement, locating the Welded joint ml- ;zzcent to one of l1l1e Q()11181'S.'l115i623l of at the middle/ of the side or end;

Fig. 1 is an enlarged View in verti e1 :evtion and elevation, 01' Hie complete annez1liiig box, indicated by the line IV-1V of.

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Fig. 5 is a plan view of the complete box;

Fig. 6 is a sectional detail view of the upper corner showing a riveted joint; and

Figs. 7, 8 and 9 are enlarged sectional detail views of the main wall, showing the steps of the weldin operation in bringing "Elle joinfi to finished shape,-

Ie makiiw the main body portion of the annealing lT U l cut :1 blank of plate motel of suitable i 1 ss and same so that when it will approximzifio "2105.4. 23, ends 3, 3 and the end portions of the plate 4;, 4: eve: ping at 5 as shown in The overlap i of these portions are eel si'ifiicient width, when justeil, to insure simple contacting area of the plates for e good Welclecl joint. lie order to provide ample stock for spreading outzirdly of the meetencls in melting; lliejoint, the encls 3 are, in the pi'eeess of :manulmture, brought imvzu'clly e sufifleien lislzance so that when the material is stretched in making; l l1e Weld, the enclu will assume e position at right as: gles to the said-es, shown 1' n Fig. 2. Thus when completed the box will be of the form Show; in composed of the back 52, ends 3 -%md continuous integz; :11 from .llio corners are preferably rounded, as shown, 501 L met-ion.

Yin Weldinq 'lzlie owl-lapping meeting ends of the min portions -2l, ll, liliey are brought iiogetlley as in Fig T, and. are then Vi ggetl (.lOZ'E] under a I'smm'ner, die, pi'ess, orol'lier means, the moo/sing Welded feces assuming 21 diagonal line Z) Willi Elie opposite corner poi-- lliGlTiS of the overlapping ends gradually merger into i neml plane of the main fz'ont pla ce and out, as at (r, 0, Fig Q The weld V pressure continued until It is not, of course, absolutely essential that the exact planes of the innerand outer surfaces be approximated throughout, except at. the inner upper portion of the box, for snug insertion. of the top.

The top 6 is made of a single piece oi pressed plate metal having a middle up wardly arching dome portion and. a continuous downwardly turned flange 7. The top is of a size to fit by its flange snugly within the upper edges 8 of the box, as in Fig. 4:, when complete, and to insure a tight fit, is of a size to justadmit insertion without excess clearance when the upper portion'of the box is expanded by heat, so that as it cools, it will shrink around the top. If preferred, the top may be flat.

Thereafter, the flange and box edges are welded together all around and the 'arts are made practically integral.

if preferred, the flange 7* of the top may be riveted to the sides 3, as indicated in Fig. 6, either with or without the welding operation, thereby insuring a solid substantial joint. The top may also be merely inserted, a described, and shrunk in, without either welding or riveting, and will thus be continuously held. in place.

By either construction, and with one side orend of the box welded in the manner described, i provide continuous, smooth, unobstructed surfaces at all points so that there is no opportunity for the flame of the an-' nealing furnace to attack any projecting portion, thus preventing wasting or weakening at any such points.

By inserting the flange of the top 6 Within the top edge portion of the box I avoid any outer projection, and present a smooth,

even surface, with ample reinforcement and strength. Also, by seating the top slightly below the top edge, as shown, I provide a surrounding crevice or gutter 9 or 9 adapted to be filled with sand, clay, or other suitable packing material, as is commonly done, for closing of leaks.

The box is provided with lifting lugs or buttons 10 at any suitable locations, preferably having shouldered and countersunk riveted connection with the inner sides of the box, as indicated at 11, thus facilitating easy and cheap renewal of these parts, when broken. or worn.

lin making the welded joint 4: it is preferably located at a position between the corners, either at the side or end of the box.

It may be made at the middle as in 1 and 2, or at one side of the middle, asin l i. li ith'oither construction. I avoid ioining the side and end of the box at corner, thereby preventing any weake of the corner 'which thus maintains original integral continuity of the This is a feature of very considerable vantage over prior constrmrtions harimx;

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corner joints of various kinds, which are subject to the weakening or destructive effect of the heat or other influences or strains resulting in failure of the box at such points.

The construction, operation, advantages, and utility of the invention will be readily understood and appreciated by those accustomed to the use of annealing boxes of this general class.

It is comparatively cheap and simple in construction; durable and eflicient in continued use because olhthe equal uniform construction throughout; and provides ample compensations for the usual strains and requirements of devices of this type.

What I claim is 1. An annealing box composed of a rec tangular plate In t-al body portion formed of a continuous integral blank preliminarily formed with its ends slightly converging whereby to provide overlapping ends at one side having ample metal for welding, said ends being welded together between the corners of the box with a resulting expansion and resumption of rectangular forma tion of the sides and ends, and atop secured to the upper portion of the bodyportion.

An annealing box composed of :1. rectangular plate metal body portion formed of a continuous integral blank preliminarily formed with its ends slightly converging whereby to provide overlapping ends at one side having ample metal for welding, said ends being welded together between the cor ners of the box with a resulting expansion and resumption of rectangular formation of the sides and ends, and a continuously smooth construction at the welded ljoint and a top secured Within the upper portion of the body.

3. An annealing box composed of .a""rctangular plate metal body portionformed of a continuous integral blank preliminarily formed with, its ends slightly converging whereby to provide overlapping ends at one side having ample metal for Welding, said ends being welded together between the corners of the box with a resulting, expansion f and resumption of rectangular formation of the sides and-ends, and a top provided with a downwardly extending flange. in-shrunk ma ma mm with. the innar upper poruien 0f 5 u 00m; EQLES in U blank pieliminmffiy his ends snighfil 0-0m igging *ovide uveflapp g ends at 01% a meta i 9 welding, said @sgethar bgiv t' a can ith 2a resulting expansion ivectmzguiar fm'mation of and 61 and a tap pmvided Wifih My extending flange in shrunk 5 with the inner upper portion of 2116i weldac} thsremu annealing box mmposed of 9. rec- Em" phig mam bady psr' u'izm farmed of wntinuous imyeggm] blank preliminarily med with end-s slighfly com 'erging 7&0 pmvide averlapping ands at one mg ample metal f0)?- welding said Weidqfl mgether beween the c0r- "'th a resulting @XPMASII'DR ami resumption of rectangmlar f0 ma'ien of the sides and ands and tap provided with a imvnwmi amending flange in engagement with the inner uppe'zr porfiion 0f the bad :m. fiveted they-mm.

r I. An annealing box c ampmsed m? a com tinueus side 21ndand wail body portion. 0f meta @3101 an aubwardlf arching twp connected therewith by syn inwardly inserted flange and. pmviding btween the tap mu? the upper edge 01? the box a. continuous sand or clay Emiding gummy,

8. A11 annealing him camposed 0f 11 remtangular plsrxe metal body portlon formed at a continmus integral hlank having its ends overiappimg and Weld-ed. together and we duced &0 xx subsmnvsially unifmm thicknessbetween its ands, and a. tap mnmmfled herewith by an inwzwdly inserted; flange providing an. uypexr co ntinmzus Wshaped opening.

In tesblmony whemof K hereunto mfiix my signature, n v

PERE .f E. HUNTER shmnk 

